body,html
    line-height:1
    font-weight:1
    font-family:'PingFang SC','STHeitiSC-Light','Helvetica-Light',arial,sans-serif

.clearfix
    display inline-block
    &::after
        display block
        content: "."
        height: 0
        line-height: 0
        clear: both
        visibility: hidden
